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  1. 原著論文

Spin-valley coupling enhanced high-TC ferromagnetism in a non-van der Waals monolayer Cr2Se3 on graphene

https://repo.qst.go.jp/records/2001632
https://repo.qst.go.jp/records/2001632
93ec503c-2031-4ade-a969-9afabebfb171
アイテムタイプ 学術雑誌論文 / Journal Article(1)
公開日 2025-05-20
タイトル
タイトル Spin-valley coupling enhanced high-TC ferromagnetism in a non-van der Waals monolayer Cr2Se3 on graphene
言語 en
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
著者 C-W Chuang.Tohoku Univ.

× C-W Chuang.Tohoku Univ.

C-W Chuang.Tohoku Univ.

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T Kawakami.Tohoku Univ.

× T Kawakami.Tohoku Univ.

T Kawakami.Tohoku Univ.

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K Sugawara.Tohoku Univ

× K Sugawara.Tohoku Univ

K Sugawara.Tohoku Univ

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K Nakayama.Tohoku Univ.

× K Nakayama.Tohoku Univ.

K Nakayama.Tohoku Univ.

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S Souma.WPI-AIMR Tohoku Univ.

× S Souma.WPI-AIMR Tohoku Univ.

S Souma.WPI-AIMR Tohoku Univ.

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Kitamura Miho

× Kitamura Miho

Kitamura Miho

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K Amemiya.KEK

× K Amemiya.KEK

K Amemiya.KEK

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Horiba Koji

× Horiba Koji

Horiba Koji

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H Kumigashira.IMRAM Tohoku Univ.

× H Kumigashira.IMRAM Tohoku Univ.

H Kumigashira.IMRAM Tohoku Univ.

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G Kremer.CNRS Universite de Lorraine

× G Kremer.CNRS Universite de Lorraine

G Kremer.CNRS Universite de Lorraine

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Y Fagot-Revurat.CNRS Universite de Lorraine

× Y Fagot-Revurat.CNRS Universite de Lorraine

Y Fagot-Revurat.CNRS Universite de Lorraine

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D Malterre.CNRS Universite de Lorraine

× D Malterre.CNRS Universite de Lorraine

D Malterre.CNRS Universite de Lorraine

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C Bigi.Synchrotron SOLEIL

× C Bigi.Synchrotron SOLEIL

C Bigi.Synchrotron SOLEIL

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F Bertran.Synchrotron SOLEIL

× F Bertran.Synchrotron SOLEIL

F Bertran.Synchrotron SOLEIL

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F H Chang.Nat.Syn.Rad.Res.Cent Hsinchu

× F H Chang.Nat.Syn.Rad.Res.Cent Hsinchu

F H Chang.Nat.Syn.Rad.Res.Cent Hsinchu

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H J Lin.Nat.Syn.Rad.Res.Cent Hsinchu

× H J Lin.Nat.Syn.Rad.Res.Cent Hsinchu

H J Lin.Nat.Syn.Rad.Res.Cent Hsinchu

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C T Chen.Nat.Syn.Rad.Res.Cent Hsinchu

× C T Chen.Nat.Syn.Rad.Res.Cent Hsinchu

C T Chen.Nat.Syn.Rad.Res.Cent Hsinchu

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T Takahashi.Tohoku Univ.

× T Takahashi.Tohoku Univ.

T Takahashi.Tohoku Univ.

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A Chainani.Nat.Syn.Rad.Res.Cent Hsinchu

× A Chainani.Nat.Syn.Rad.Res.Cent Hsinchu

A Chainani.Nat.Syn.Rad.Res.Cent Hsinchu

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T Sato.Tohoku Univ.

× T Sato.Tohoku Univ.

T Sato.Tohoku Univ.

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抄録
内容記述タイプ Abstract
内容記述 Spin-valley magnetic ordering is restricted to layered van der Waals type transition-metal dichalcogenides with ordering temperatures below 55 K. Recent theoretical studies on non-van der Waals structures have predicted spin-valley polarization induced semiconducting ferromagnetic ground states, but experimental validation is missing. We report high-Curie temperature (TC ~ 225 K)metallic ferromagnetism with spontaneous spin-valley polarization in monolayer Cr2Se3 on graphene. Angle-resolved photoemission spectroscopy (ARPES) reveals systematic temperature-dependent energy shifts and splitting of localized Cr 3 d↑-t2g bands, accompanied by occupancy of the itinerant Cr 3d-eg valleys. The t2g-eg spin-valley coupling at the K/K’ points of hexagonal Brillouin zone leads to ferromagnetic ordering. Circular dichroism in ARPES shows clear evidence of spin-valley polarized states. Comparison with bilayer and trilayer Cr2Se3 reveals the crucial role of valley carrier density in enhancing TC and provides a guiding principle to realize 2D ferromagnetism at higher temperatures in non-van der Waals materials.
書誌情報 Nature Communications

巻 16, 号 3448, p. 1-8, 発行日 2025-04
出版者
出版者 Springer Nature
PubMed番号
識別子タイプ PMID
関連識別子 40251150
DOI
識別子タイプ DOI
関連識別子 10.1038/s41467-025-58643-3
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